Investigators also say Riess shot and killed 59-year-old Pamela Hutchinson in Fort Myers Beach, Fla., because the Bradenton woman looked like her. She allegedly stole Hutchinson's identification and credit cards and fled in Hutchinson's 2005 Acura TL. Hutchinson was found April 9.

Earlier Thursday, new information showed that Riess had stopped at a Louisiana casino and won a jackpot prize.

Deputy U.S. Marshal John Kinsey confirmed Riess claimed a prize at the Coushatta Casino Resort in Kinder, La., on April 8.

Though Riess had Hutchinson's ID, she decided to use her own to collect the jackpot, Kinsey said.

Investigators believe that on March 23, Riess drove to a bank in Glenville, Minn., and cashed over $10,000 in stolen and forged checks from her husband and his business. She later spent most of the day gambling at Diamond Jo Casino in Northwood, Iowa, before stopping at the gas station for a sandwich and directions south out of the state, according to a news release.